Integrated Circuits Used 74LS76 Procedure Add IC 74LS76 into ICBase-1 (74LS76).Connect Pin-18 (Output) of ICBase-2 (74LS76) to Pin-14 (Output) of ICBase-1 (74LS76).Add IC 74LS76 into ICBase-2 (74LS76).Add IC 74LS76 into ICBase-3 (74LS76).